Examlex
One of the characteristics of brain death can be revealed by a flat tracing on an electroencephalogram.
Synthetic Substances
Artificial materials created through chemical processes, not found naturally.
Coal
A natural, black or brownish-black sedimentary rock used primarily as a fuel source in electricity generation and steel production.
Petroleum
A liquid mixture of hydrocarbons that is present in certain rock strata and can be extracted and refined to produce fuels including gasoline, kerosene, and diesel oil.
Domestic Fuel
Fuels used for household purposes, such as cooking, heating, or electricity generation, which include natural gas, coal, and biofuel.
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